CN117383889A - Slag blocking cone and preparation method thereof - Google Patents

Slag blocking cone and preparation method thereof Download PDF

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Publication number
CN117383889A
CN117383889A CN202311411075.4A CN202311411075A CN117383889A CN 117383889 A CN117383889 A CN 117383889A CN 202311411075 A CN202311411075 A CN 202311411075A CN 117383889 A CN117383889 A CN 117383889A
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parts
iron sand
slag
cone
coagulant
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CN117383889B (en
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高荣彬
孙如莹
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Hengshui Zhaoxing Composite Materials Co ltd
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Hengshui Zhaoxing Composite Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/143—Calcium-sulfate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/123—Amino-carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
    • C04B2111/00887—Ferrous metallurgy
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Ceramic Products (AREA)

Abstract

The invention relates to the technical field of steel smelting, and provides a slag blocking cone and a preparation method thereof, wherein the raw materials comprise the following components in parts by weight: 40-50 parts of white corundum, 40-60 parts of iron sand, 20-30 parts of mullite powder, 10-20 parts of high alumina cement and 5-10 parts of coagulant; the coagulant is formed by mixing calcium sulfate and 1, 2-cyclohexanediamine tetraacetic acid. Through above-mentioned technical scheme, the lower problem of pushing off slag awl high temperature strength among the prior art has been solved.

Description

Slag blocking cone and preparation method thereof
Technical Field
The invention relates to the technical field of steel smelting, in particular to a slag blocking cone and a preparation method thereof.
Background
The slag blocking cone is a functional refractory product. When the converter is tapped, the converter is usually placed in a tap hole, and slag is prevented from entering a ladle along with molten steel by utilizing the characteristic that the density of the converter is between that of the molten steel and slag, so that tapping slag is reduced. The traditional slag stopping cone production process is to add weight materials such as cast iron blocks, iron beads, brown corundum slag, scrap iron pressed blocks or scrap steel and the like into magnesia, aluminum or aluminum-silicon refractory materials to improve the volume density of the slag stopping cone so as to achieve the best slag stopping effect.
Because substances such as steel, iron and the like are introduced into the slag stopping cone, the high-temperature strength of the slag stopping cone is reduced. If the high-temperature strength of the slag stopping cone is too low, the slag stopping cone is molten and cracked too early in tapping, so that slag cannot be stopped effectively, molten steel rephosphorization is caused, and the cleanliness of the molten steel is affected. Therefore, the development of the slag blocking cone with excellent high-temperature strength has important significance.
Disclosure of Invention
The invention provides a slag blocking cone and a preparation method thereof, which solve the problem of lower high-temperature strength of the slag blocking cone in the related art.
The technical scheme of the invention is as follows:
the invention provides a slag blocking cone, which comprises the following raw materials in parts by weight: 40-50 parts of white corundum, 40-60 parts of iron sand, 20-30 parts of mullite powder, 10-20 parts of high alumina cement and 5-10 parts of coagulant;
the coagulant is formed by mixing calcium sulfate and 1, 2-cyclohexanediamine tetraacetic acid.
As a further technical scheme, the mass ratio of the calcium sulfate to the 1, 2-cyclohexanediamine tetraacetic acid is 7:3-9:1.
When the mass ratio of the calcium sulfate to the 1, 2-cyclohexanediamine tetraacetic acid is 7:3-9:1, the high-temperature flexural strength and the high-temperature compressive strength of the slag stopping cone are further improved.
As a further technical scheme, the iron sand is modified iron sand, and the modified iron sand comprises the following components: iron sand, copper powder and titanium diboride.
As a further technical scheme, the mass ratio of the iron sand to the copper powder to the titanium diboride is 9-12:1:2.
When the mass ratio of the iron sand to the copper powder to the titanium diboride is 9-12:1:2, the slag blocking cone can have better high-temperature breaking strength and high-temperature compressive strength.
As a further technical scheme, the preparation method of the modified iron sand comprises the following steps: and uniformly mixing copper powder and titanium diboride, adding iron sand, uniformly mixing, vacuum sintering, crushing and grinding to obtain the modified iron sand.
As a further technical method, the temperature is 1100-1200 ℃ and the time is 1-2h during the vacuum sintering.
As a further technical scheme, the particle sizes of the white corundum, the iron sand and the mullite powder are respectively and independently 80-200 meshes.
As a further technical scheme, the particle size of the white corundum is 80-100 meshes; and/or
The particle size of the iron sand is 120-150 meshes; and/or
The grain size of the mullite powder is 180-200 meshes.
The invention also provides a preparation method of the slag blocking cone, which comprises the following steps:
s1, preparing castable: uniformly mixing white corundum, iron sand, mullite powder, high alumina cement and a coagulant, and adding water to uniformly mix to obtain a castable;
s2, forming: and (3) filling the castable into a mold, vibrating, molding, maintaining, demolding and baking to obtain the slag blocking cone.
As a further technical scheme, in the step S2, the maintenance is natural maintenance, and the time is 24-36h.
As a further technical scheme, in the step S2, the temperature is 100-120 ℃ and the time is 24-36h during baking.
The invention also provides application of the slag blocking cone in converter steelmaking.
The working principle and the beneficial effects of the invention are as follows:
1. in the invention, the coagulant is formed by mixing calcium sulfate and 1, 2-cyclohexanediamine tetraacetic acid, and the molding of the slag stopping cone is promoted and the high-temperature breaking strength and the high-temperature compressive strength of the slag stopping cone are improved through the inorganic-organic synergy.
2. According to the invention, the copper powder and titanium diboride are used for modifying the iron sand, so that the high-temperature melting resistance of the iron sand is enhanced, and the high-temperature breaking strength and the high-temperature compressive strength of the slag blocking cone are further improved. The addition of the copper powder can improve the wettability of the surface of the iron sand, promote the formation of good metallurgical bonding of the iron sand, the copper powder and the titanium diboride, thereby further improving the high-temperature flexural strength and the high-temperature compressive strength of the slag blocking cone.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples and comparative examples, white corundum was purchased from sandisk macromaterial Co., ltd. In Zhengzhou, having a particle size of 80 mesh and an alumina content of 99.5wt%, unless otherwise specified; iron sand was purchased from Kunshan Xindong mechanical Co., ltd, particle size was 150 mesh, and iron content was 99.8wt%; mullite powder is purchased from a Yi mineral product processing plant in Lingshu county, the grain size is 200 meshes, and the content of silicon dioxide is 53wt%; copper powder was purchased from Yingtai metal materials limited in south palace, and had a particle size of 300 mesh; titanium diboride is purchased from Shandong Nepal Biotechnology Co., ltd, and has a particle size of 500 meshes; the high alumina cement is purchased from Zhengzhou Zhongtai cement Co., ltd, and the model is CA-50; calcium sulfate was purchased from gallery dry technology limited in an amount of 99.5wt%;1, 2-cyclohexanediamine tetraacetic acid was purchased from Nantong Runfeng petrochemical Co., ltd and contained 98% by weight.
Example 1
The preparation method of the slag blocking cone comprises the following steps:
s1, preparing castable: uniformly mixing 40 parts of white corundum, 40 parts of iron sand, 20 parts of mullite powder, 10 parts of high alumina cement and 5 parts of coagulant, and adding 11.5 parts of water to uniformly mix to obtain a castable;
wherein the coagulant is formed by mixing 2.5 parts of calcium sulfate and 2.5 parts of 1, 2-cyclohexanediamine tetraacetic acid;
s2, forming: and (3) filling the castable into a mould, vibrating and forming, naturally curing for 24 hours, demoulding, and baking at 100 ℃ for 36 hours to obtain the slag blocking cone.
Example 2
The preparation method of the slag blocking cone comprises the following steps:
s1, preparing castable: uniformly mixing 50 parts of white corundum, 60 parts of iron sand, 30 parts of mullite powder, 20 parts of high alumina cement and 10 parts of coagulant, and adding 17 parts of water to uniformly mix to obtain castable;
wherein the coagulant is formed by mixing 5 parts of calcium sulfate and 5 parts of 1, 2-cyclohexanediamine tetraacetic acid;
s2, forming: and (3) filling the castable into a mould, vibrating and forming, naturally curing for 36 hours, demoulding, and baking at 120 ℃ for 24 hours to obtain the slag blocking cone.
Example 3
This example differs from example 2 only in that in step S1 of this example the setting accelerator is formed by mixing 9.5 parts of calcium sulphate with 0.5 part of 1, 2-cyclohexanediamine tetraacetic acid.
Example 4
The difference between this example and example 2 is only that in step S1 of this example, the accelerator is formed by mixing 7 parts of calcium sulfate and 3 parts of 1, 2-cyclohexanediamine tetraacetic acid.
Example 5
This example differs from example 2 only in that in step S1 of this example, the accelerator is formed by mixing 9 parts of calcium sulfate and 1 part of 1, 2-cyclohexanediamine tetraacetic acid.
Example 6
The difference between this embodiment and embodiment 4 is that the iron sand in step S1 of this embodiment is modified iron sand;
the preparation method of the modified iron sand comprises the following steps: mixing 6 parts of copper powder and 12 parts of titanium diboride uniformly, adding 42 parts of iron sand, mixing uniformly, sintering for 1.5 hours at 1150 ℃ in vacuum, and crushing and grinding until the particle size is 150 meshes to obtain the modified iron sand.
Example 7
The difference between this embodiment and embodiment 4 is that the iron sand in step S1 of this embodiment is modified iron sand;
the preparation method of the modified iron sand comprises the following steps: mixing 3 parts of copper powder and 6 parts of titanium diboride uniformly, adding 51 parts of iron sand, mixing uniformly, sintering for 1.5 hours at 1150 ℃ in vacuum, and crushing and grinding until the particle size is 150 meshes to obtain the modified iron sand.
Example 8
The difference between this embodiment and embodiment 4 is that the iron sand in step S1 of this embodiment is modified iron sand;
the preparation method of the modified iron sand comprises the following steps: mixing 5 parts of copper powder and 10 parts of titanium diboride uniformly, adding 45 parts of iron sand, mixing uniformly, sintering for 1.5 hours at 1150 ℃ in vacuum, and crushing and grinding until the particle size is 150 meshes to obtain the modified iron sand.
Example 9
The difference between this embodiment and embodiment 4 is that the iron sand in step S1 of this embodiment is modified iron sand;
the preparation method of the modified iron sand comprises the following steps: mixing 4 parts of copper powder and 8 parts of titanium diboride uniformly, adding 48 parts of iron sand, mixing uniformly, sintering for 1.5 hours at 1150 ℃ in vacuum, and crushing and grinding until the particle size is 150 meshes to obtain the modified iron sand.
Comparative example 1
The present comparative example differs from example 1 only in that in step S1 of the present comparative example, no accelerator is added.
Comparative example 2
The comparative example differs from example 1 only in that in step S1 of the comparative example, the accelerator is 5 parts of calcium sulfate.
Comparative example 3
The comparative example differs from example 1 only in that in step S1 of the comparative example, the accelerator is 5 parts of 1, 2-cyclohexanediamine tetraacetic acid.
The following performance tests were performed on the slag cones prepared in examples 1 to 9 and comparative examples 1 to 3:
(1) high temperature flexural strength: testing according to GB/T3002-2017 refractory high temperature flexural strength test method, wherein the test temperature is 1400 ℃, the heat preservation time is 30min, and the loading rate is 0.15MPa/s;
(2) high temperature compressive strength: the test is carried out according to GB/T34218-2017 refractory high temperature compressive strength test method, wherein the test temperature is 1400 ℃, the heat preservation time is 5min, the heating rate is 10 ℃/min, and the loading rate is 1.0MPa/s.
The test results are shown in table 1 below.
TABLE 1 slag cone performance test results
Comparison of example 1 and comparative examples 1-3 shows that the high temperature flexural strength and the high temperature compressive strength of the slag tap are obviously improved by the synergistic effect of the calcium sulfate and the 1, 2-cyclohexanediamine tetraacetic acid.
Comparison of examples 2-3 with examples 4-5 shows that when the mass ratio of calcium sulfate to 1, 2-cyclohexanediamine tetraacetic acid is 7:3-9:1, the high temperature flexural strength and the high temperature compressive strength of the slag bridge are further improved. Comparison of example 4 with examples 6-9 shows that the high temperature flexural strength and high temperature compressive strength of the slag tap can be further improved by modifying the iron sand with copper powder and titanium diboride. Examples 6-7 and examples 8-9 show that when the mass ratio of the iron sand to the copper powder to the titanium diboride is 9-12:1:2, the slag stopping cone can have better high-temperature flexural strength and high-temperature compressive strength.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. The slag blocking cone is characterized by comprising the following raw materials in parts by weight: 40-50 parts of white corundum, 40-60 parts of iron sand, 20-30 parts of mullite powder, 10-20 parts of high alumina cement and 5-10 parts of coagulant;
the coagulant is formed by mixing calcium sulfate and 1, 2-cyclohexanediamine tetraacetic acid.
2. The slag tap as set forth in claim 1, wherein the mass ratio of the calcium sulfate to the 1, 2-cyclohexanediamine tetraacetic acid is 7:3 to 9:1.
3. The slag tap of claim 1, wherein the iron sand is a modified iron sand comprising the following components: iron sand, copper powder and titanium diboride.
4. A slag cone as claimed in claim 3 wherein the mass ratio of iron sand to copper powder to titanium diboride is 9-12:1:2.
5. The slag cone as set forth in claim 3, wherein the modified iron sand is prepared by the following steps: and uniformly mixing copper powder and titanium diboride, adding iron sand, uniformly mixing, vacuum sintering, crushing and grinding to obtain the modified iron sand.
6. The slag cone as set forth in claim 1 wherein said white corundum, iron sand, mullite powder each independently has a particle size of 80-200 mesh.
7. The slag stopping cone as claimed in claim 6, wherein the particle size of the white corundum is 80-100 mesh; and/or
The particle size of the iron sand is 120-150 meshes; and/or
The grain size of the mullite powder is 180-200 meshes.
8. A method for producing the slag tap as defined in any one of claims 1 to 7, comprising the steps of:
s1, preparing castable: uniformly mixing white corundum, iron sand, mullite powder, high alumina cement and a coagulant, and adding water to uniformly mix to obtain a castable;
s2, forming: and (3) filling the castable into a mold, vibrating, molding, maintaining, demolding and baking to obtain the slag blocking cone.
9. The method for preparing a slag cone according to claim 8, wherein in the step S2, the temperature is 100-120 ℃ and the time is 24-36h during baking.
10. Use of a slag cone according to any one of claims 1-7 or obtained by a method of manufacture according to any one of claims 8-9 in converter steelmaking.
CN202311411075.4A 2023-10-28 2023-10-28 Slag blocking cone and preparation method thereof Active CN117383889B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU663682A1 (en) * 1977-05-19 1979-05-25 Восточный научно-исследовательский и проектный институт огнеупорной промышленности Method of manufacturing refractories
SU783277A1 (en) * 1979-02-05 1980-11-30 Научно-Исследовательский Институт Бетона И Железобетона Госстроя Ссср Polymer-concrete mix
CN101049939A (en) * 2007-03-13 2007-10-10 云南博尚高岭土有限公司 Method for preparing mullite from kaoline
CN101952012A (en) * 2008-05-29 2011-01-19 卡勒拉公司 Rocks and aggregate, and methods of making and using the same
CN110355699A (en) * 2019-05-19 2019-10-22 北京工业大学 A kind of aluminium base diamond composite ELID grinding wheel for grinding and preparation method thereof
CN111116204A (en) * 2019-12-13 2020-05-08 北京瑞普同创科技发展有限公司 High-performance blast furnace main channel slag retaining wall prefabricated part, and preparation method and construction method thereof
CN114105654A (en) * 2020-12-18 2022-03-01 山东耐火材料集团有限公司 Large-scale blast furnace iron runner slag line gunning mix and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU663682A1 (en) * 1977-05-19 1979-05-25 Восточный научно-исследовательский и проектный институт огнеупорной промышленности Method of manufacturing refractories
SU783277A1 (en) * 1979-02-05 1980-11-30 Научно-Исследовательский Институт Бетона И Железобетона Госстроя Ссср Polymer-concrete mix
CN101049939A (en) * 2007-03-13 2007-10-10 云南博尚高岭土有限公司 Method for preparing mullite from kaoline
CN101952012A (en) * 2008-05-29 2011-01-19 卡勒拉公司 Rocks and aggregate, and methods of making and using the same
CN110355699A (en) * 2019-05-19 2019-10-22 北京工业大学 A kind of aluminium base diamond composite ELID grinding wheel for grinding and preparation method thereof
CN111116204A (en) * 2019-12-13 2020-05-08 北京瑞普同创科技发展有限公司 High-performance blast furnace main channel slag retaining wall prefabricated part, and preparation method and construction method thereof
CN114105654A (en) * 2020-12-18 2022-03-01 山东耐火材料集团有限公司 Large-scale blast furnace iron runner slag line gunning mix and preparation method thereof

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